<template>
  <div class="list" ref="wrapper">
      <div>
        <div class="area">
                <div class="title">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
        </div>
        <div class="area">
                <div class="title">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                    v-for="item of hotCities"
                    :key="item.id"
                    @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
        </div>
        <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list"
                v-for="innerItem of item"
                :key="innerItem.id"
                @click="handleCityClick(innerItem.name)">
                    <div class="item border-bottom">{{innerItem.name}}</div>
                </div>
        </div>
      </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        // eslint-disable-next-line no-unused-vars
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
     @import '~styles/varibles.styl'
     .border-topbottom
        &:before
            border-color: #cccccc
        &:after
            border-color: #cccccc
     .border-bottom
        &:before
            border-color: #cccccc
    .list
        overflow : hidden
        position :absolute
        top: 1.58rem
        left: 0
        right: 0
        bottom: 0
        .title
            line-height :.44rem
            background :#eee
            padding-left : .2rem
            line-height : .54rem
            color: #666
            font-size : .26rem
        .button-list
            overflow: hidden
            padding: .1rem .6rem .1rem .1rem
            .button-wrapper
                float: left
                width: 33.33%
                .button
                    margin : .1rem
                    padding: .1rem 0
                    border-radius: .06rem
                    text-align: center
                    border: .02rem solid #ccc
        .item-list
            .item
                line-height : .76rem
                padding-left: .2rem
</style>
